Carburetor for internal-combustion engines



1,623,760 April 5, 1927. J SIEBER vCJARBUREITOR FOR INTERNAL COMBUSTION ENGINES Filed June a, 1924 ATTO/PAM?? 45 structed as a spring actuated check valve, a

9 used for almost any kind of fuel, for 1n- Patented Apr. 5, 1927.

JACOB SIEBER, F LONDON, ENGLAND,

FOREST HILL, LONDON,

ASSIGNOR T0 CHARLES T HOHAS EVERIST, 0F

ENGLAND.

CARBUBETOB. FOB. INTERNAL-COMBUSTION ENGINES.

Application filed June 2, 1924, Serial No. 717,434, and in Switzerland June 12, 1923.

The present invention relates to carburetors for internal combustion engines. The main feature of the improved carburetor is the provision of means for admitting water 5 into the mixing chamber at a point between the rotary mixer and the throttle.- Various other subsidiary features will be hereinafter described with reference to the accompanying drawings which illustrate byv way o example one construction of the carburetor. Fig. 1 is a vert-ical section through the carburetor. Fig. 2 is a top view of the valve device controlling the fuel admission, Fig. 3 is an elevation corresponding to Fig. 1.

Referring to Figs. 1 to'3, the tubular casing 101 of the carburetor is provided in its lower rtion 102 with a choke valve 104 rotatab y mounted at 105, and is provide at its upper or discharge end 103 with a throttle valve 106 turnably mounted at. 107 .for controlling the discharge of the combustible mixture. v

' -The carburetor may, as usual, be connected by means of its upper flange to the induction tubeof the engine. The shafts 105 and 107 of the choke' and throttle valves 104 and 106 are operatively connected by arms 108 and 109 c'oupled by a connecting rod 110.Y The proportions of the cross sectional areas of the air passage and the combustible fuel desired be varied byV varying passage may i the' effective lengths of the arms 108 and 109 forwhich purpose each arm is provided with a number o holes for receiving the corresgonding ends of the connecting rod 110. etween the choke and throttle valves 104 and 106 is rotatablymounted between two cross rods 112 and 113 a fan-like rotary mixer 114 carried by a vertical shaft 115.` The water isadmitted through' a conical check valve 116 arranged at a point abovey the rotary mixer 114, that is, at a point between the rotary mixer and the throttle 106. The water admission valve is `conspring 118 surrounding the valve stem 11 and acting upon a disc 122 held` by a nut 120. The water is admitted from a supply pipe 124 which is fixed to the casing 125 by means of a vscrew cap 126, `and passes into ,the valve casing through asmall hole 123 `and small holes (not shown) in the dise 122. The'valve 116 has only a very small 1i relatively to the valve seat 121 and is actuated by the suction produced -by the engme acting upon a disc 117 fixed to an internal l projection of the valve. It will bey understood that at very low speed no, or ver little, water will be admitted, whilst at high speed of the engine the suction acting u on the ydisc 117 will lift the valve and al ow water to drop uponthe rotary mixer 114. As a rule, the water will be atomized before reaching the rotary mixer. Between the rotary mixer 114 and the choke valve 104 is arranged a liquid fuel supply preferably in 'such a manner as to cause the fuel jet to issue through'the inclined orifice 134 ofthe nozzle 133 in an oblique direction as indicated by the chain llne in Fig. 1. The needle valve '141 regulating the fuel supply to the nozzle 133 is held in the closed posid tion by a spring 142 mounted in the tubular extension 129 of the casing 127. Inthe casing 127 which communicates with thenozzle by a tubular extension 128 having a longitudinal bore 130 is rotatably mounted a cam 138 the shaft 139 of which carries a lever `145 coupled by a connecting rod 111 to the connecting rod 110.' The cam 138 acts .directly upon the inner end of the needle valve y 141 as shown' in Fig. 2 and isheld in position byl a spring 137 held by a. cap 136 screwed into the end of the chamber 135. The tubular part 128 isfixed to a tubular extension 132 by means of anut 131. A stop valve 144 adapted to be actuated by means' of a rodl151 and lever 150 is provided in the fuel admission pipe 143 leading to the tubular extension 129. The proportion of the fuel admission may again be varied by' altering the position of the connecting rod 111 for which purpgse the lever 145 is provided with a num lr of holes. It will be understood that the three valves 141, 104 and 106 are simultaneously operated by the same operating part acting for instance' upon the lever 145,.'

'The carburetor may, if preferred, be used without a constant levelvtank Iandmay be 100 stance, benzine, petrol, alcohol or acetylene. Vhen using trol, it is advisable to use an admixture o benzine until the petrol` is sufficiently heated. The proportion of water 105 may vary within wide limits and is, for instance, higher when using acetylene than when us" petrol.

The ca retor is particularly suitable for heavy cars and lorries. With both 110 "direct fuel unobstructedly throttle and choke valves fully open at full speedthe suction and the carburetor will be sufficient to revolve the fan at a very high speed whereby complete atomization of the fuel and the water ma be attained. It will be seen that all parts are very easily accessible and that the carburetor may be very easily cleaned.

I claim z" l. A carburetor comprising in combination a mixing chamber, a rotary mixer located within said mixing chamber. an air inlet in said mixing chamber adapted to direct air onto said rotary mixer, a fuel inlet on said mixing chamber adapted to mixer, a water inlet adapted to direct water unobstructedly onto said rotary mixer and a mixture outlet, said air, fue] and water inlets being adapted to direct air, fuel and water simultaneously onto said rotary mixer.

2. A carburetor comprising in combination a mixing chamber, a rotary mixer located within said mixing chamber, an air inlet in said mixing chamber adapted to direct air onto said rotary mixer, a fuel inlet on said mixing chamber arranged between said rotary mixer and said air inlet and adapted to direct fuel unobstructedly onto said rotary mixer, a mixture outlet on said mixing chamber, and a water inlet arranged between said rotary mixer and said mixture outlet and adapted to direct water unobstructedly onto said rotary mixer, said air, fuel and water inlets being adapted to direct air, fuel and water simultaneously onto said rotary mixer.

3. A carburetor comprising in combination a mixing chamber, a rotary mixer located within said mixing chamber, an air inlet in said mixing chamber adapted to direct air onto said rotary mixer, a fuel inlet on said mixing chamber adapted to direct fuel unobstructedly onto said rotary mixer, a. throttle valve, and a water inlet arranged between said rotary mixer and said throttle valve and adapted to direct water unobstructedly onto said rotary mixer, said air, fuel and water inlets being adapted to direct air, fuel and water simultaneously onto said rotary mixer.

4. A carburetor comprising in combination a mixing chamber, a rotary mixer `located within said mixing chamber, an air inlet in" said mixing chamber adapted to direct air onto said rotary mixer, a fuel inlet on said mixing chamber adapted to direct fuel unobstructedly onto said rotary mixer, a water inlet adapted to direct water unobstructedly onto said rotary mixer7 said air, fuel and water inlets being adapted to onto sa id rot ary direct air, fuel and water simultaneously onto said rotary mixer, a throttle valve, said water inlet being arranged between said rotary mixer and said throttle valve, ,aneedle valve controlling said fuel inlet and a cam actuating said needle valve.

v5. A carburetor comprising in combination a mixing chamber, a rotary mixer located within said mixing chamber, an air inlet in said mixing chamber adapted to direct air onto said rotary7 mixer, a fuel inlet on said mixing chamber adapted to direct fuel unobstructedly onto said rotary mixer, a water inlet adapted to direct water unobstructedly onto said rotary mixer, said air, fuel and water inlets being adapted to direct air, fuel and water simultaneously onto said rotary liiixer, a throttle valve, said water inlet being arranged between said rotary mixer and said throttle valve, and said fuel inlet being adapted to cause the fuel jet to issue below the rotary mixer and in a direction oblique to the axis of rotation thereof.

6. A carburetor comprising in combination a mixing chamber, a rotary mixer located within said mixing chamber, an air inlet in said mixing chamber adapted to direct air onto said rotary mixer, a fuel inlet on said mixing chamber adapted to ,I

direct fuel unobstructedly onto said rotary mixer, a water inlet adapted to direct water unobstructedly onto said rotary mixer, said air, fuel and water inlets being adapted to direct air, fuel and water simultaneously onto said rotary mixer, a throttle valve, said water inletbeino arranged between said rotary mixer and saidv throttle valve, air and fuel admission valves, and operating means interconnecting said air, fuel and throttle valves.

'7. A carburetor comprising in combination a mixing chamber, a choke valve in said mixing chamber, a throttle valve in said mixing chamber, a rotary mixer arranged between said choke valve and said throttle valve, an air inlet in said mixing chamber adapted to direct air onto said rotary mixer, a. liquid fuel nozzle arranged between the choke valve and the rotary mixer and adapted to direct fuel unobstructedly onto said rotary mixer in an oblique direction, a

. water inlet adapted to direct water unobstructedly onto said rotary mixer, and a water admission valve arranged between the i rotary mixer and the throttle valve, said air and water inlets and said liquid fuel nozzle being adapted to direct air, fuel and water simultaneously onto said rotary mixer.

In testimony whereof I have hereunto set my hand.

.nicos smsen..v 

